/*
 * Copyright 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.compose.animation.demos.suspendfun

import androidx.compose.animation.core.RepeatMode
import androidx.compose.animation.core.animate
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.tween
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material.Icon
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Favorite
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableFloatStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.tooling.preview.Preview

@Preview
@Composable
fun InfiniteAnimationDemo() {
    var alpha by remember { mutableFloatStateOf(1f) }
    LaunchedEffect(Unit) {
        animate(
            initialValue = 1f,
            targetValue = 0f,
            animationSpec =
                infiniteRepeatable(animation = tween(1000), repeatMode = RepeatMode.Reverse),
        ) { value, _ ->
            alpha = value
        }
    }
    Box(Modifier.fillMaxSize()) {
        Icon(
            Icons.Filled.Favorite,
            contentDescription = null,
            modifier =
                Modifier.align(Alignment.Center)
                    .graphicsLayer(scaleX = 3.0f, scaleY = 3.0f, alpha = alpha),
            tint = Color.Red,
        )
    }
}
